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/* tee - read from standard input and write to standard output and files.
Copyright (C) 1985, 1990, 1991 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Mike Parker, Richard M. Stallman, and David MacKenzie */
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#include <getopt.h>
#include "system.h"
char *xmalloc ();
void error ();
void xwrite ();
static int tee ();
/* If nonzero, append to output files rather than truncating them. */
static int append;
/* If nonzero, ignore interrupts. */
static int ignore_interrupts;
/* The name that this program was run with. */
char *program_name;
static struct option const long_options[] =
{
{"append", no_argument, NULL, 'a'},
{"ignore-interrupts", no_argument, NULL, 'i'},
{NULL, 0, NULL, 0}
};
void
main (argc, argv)
int argc;
char **argv;
{
int errs;
int optc;
program_name = argv[0];
append = 0;
ignore_interrupts = 0;
while ((optc = getopt_long (argc, argv, "ai", long_options, (int *) 0))
!= EOF)
{
switch (optc)
{
case 'a':
append = 1;
break;
case 'i':
ignore_interrupts = 1;
break;
default:
fprintf (stderr, "\
Usage: %s [-ai] [--append] [--ignore-interrupts] [file...]\n",
program_name);
exit (1);
}
}
if (ignore_interrupts)
{
#ifdef _POSIX_VERSION
struct sigaction sigact;
sigact.sa_handler = SIG_IGN;
sigemptyset (&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction (SIGINT, &sigact, NULL);
#else /* !_POSIX_VERSION */
signal (SIGINT, SIG_IGN);
#endif /* _POSIX_VERSION */
}
errs = tee (argc - optind, &argv[optind]);
if (close (0) != 0)
error (1, errno, "standard input");
if (close (1) != 0)
error (1, errno, "standard output");
exit (errs);
}
/* Copy the standard input into each of the NFILES files in FILES
and into the standard output.
Return 0 if successful, 1 if any errors occur. */
static int
tee (nfiles, files)
int nfiles;
char **files;
{
int *descriptors;
char buffer[BUFSIZ];
register int bytes_read, i, ret = 0, mode;
if (nfiles)
descriptors = (int *) xmalloc (nfiles * sizeof (int));
mode = O_WRONLY | O_CREAT;
if (append)
mode |= O_APPEND;
else
mode |= O_TRUNC;
for (i = 0; i < nfiles; i++)
{
descriptors[i] = open (files[i], mode, 0666);
if (descriptors[i] == -1)
{
error (0, errno, "%s", files[i]);
ret = 1;
}
}
while ((bytes_read = read (0, buffer, sizeof buffer)) > 0)
{
xwrite (1, buffer, bytes_read);
for (i = 0; i < nfiles; i++)
if (descriptors[i] != -1)
xwrite (descriptors[i], buffer, bytes_read);
}
if (bytes_read == -1)
{
error (0, errno, "read error");
ret = 1;
}
for (i = 0; i < nfiles; i++)
if (descriptors[i] != -1 && close (descriptors[i]) != 0)
{
error (0, errno, "%s", files[i]);
ret = 1;
}
if (nfiles)
free (descriptors);
return ret;
}
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